Heating And Cooling
What is it?
Heat is a by-product of the internal combustion engine. The primary job of the cooling system is to keep the engine from overheating by transferring this heat to the air. Another important job of the cooling system is to allow the engine to heat up as quickly as possible, and then to keep the engine at a constant temperature.
How does it work?
The cooling system circulates a fluid through pipes and passageways in the engine, as this liquid passes through the hot engine, it absorbs heat, cooling the engine. After the liquid leaves the engine, it passes through a radiator, which transfers the heat from the fluid to the air blowing through the radiator.
KEY SYSTEM COMPONENTS
Antifreeze is mixed with a precise volume of water to produce a solution that lowers the freezing point of this solution. This reduces the likelihood that the water in your closed cooling system will freeze, expand and damage the engine block and other system components. Antifreeze also raises the boiling point of water under pressure, thereby enhancing the cooling system’s ability to remove and dissipate heat.
If you’re stuck in traffic or driving slowly you need something to “Pull” the air over the radiator. This is the reason for cooling fans. Fans are usually mounted just behind the radiator. There are two types of cooling fans, belt powered and electric powered.
The radiator is the cooling device designed to dissipate heat, which the coolant has absorbed from the engine. It is constructed on a large surface area to dissipate the heat through convection with the air flowing through the radiator.
Radiator Cap & Hoses
The radiator cap is an often-overlooked crucial part of the cooling process. It is designed to keep the coolant circulating under pressure. Hoses are used to connect the engine and the water pump to the radiator.
The thermostat is responsible for allowing the engine to warm up to the proper operating temperature before allowing the cooling system to begin circulating coolant. The thermostat is located between the engine and the radiator and is essentially a temperature-sensitive spring valve. It stays closed during engine warm-up and then opens when the system reaches the proper operating temperature.